Electrode



Patented May '16, 1922 J. W. FAY.

ELECTRODE.

APPLICATION FILED JUNE 24. I921-.1

JNVENTOR. l

' 1 ATToRNEY.

I s v///////7///,/////// i UNITED STATES PA'rE-N'r OFFICE.

JOSEPH w. EAY, 'or MILWAUKEE, WIsCONsIN, ASSIGNOE To SEAMWELD EQUIPMENT A' COMPANY, OE MILWAUKEE, WISCONSIN, A CORPORATION orV WISCONSIN.

mc'monE. i

' Application inea June 24,

vTo all whom t may Concern;

United States Letters Patent No. 1,359,976, dated November 23, 1920, in which paper insulation is cemented to the metal core of the electrode, it is very .essential for eilicient operation that the insulation burn olf evenly and be completely consumed, that is, the

insulation should not fall from the metallic Score in a partially, burned condition. While the annular groove construction, such as shown in the patent above referred to, assists in securing an even burning of the insulation, I find that this may be made more positive by providing a plurality of radially eX- tending ribs on the insulation in conjunction with the grooves, for while the section of paper may become loosened by a burning in the line of depression, the ribs prevent this section falling ofi' in partially consumed condition, because said' section iswholly consumed when its ribbed portion has been burned off.

Theinvention further consists in the several features hereinafter set forth and more particularly defined by claims at the con clusion hereof. l

In the drawings: Fig. 1 is an elevation view of a partial length of electrode embodying the invention; Fig. 2 is a similar view with parts broken away and parts shown in section; Fig. 3 is a section taken on the line 3e-3 of Fig. 2; Fig. 4 is a view similar tofIfig. 1 showing an electrode provided with a pair of ribs; Fig. 5 is a section taken on the line 5 5 of Fig. 4.

Any suitable material may be used for the electrode proper, that is, the metallic core, and'it :may be of any suitable shape, diameter and length. I prefer for the purpose a circular metal bar 6. The entire length of that portion of the bar which is to be deposited on the seam to be welded is enclosed in a coating of heat-resisting cement 7 of Specification of Letters Patent.

Patented May 1.62, 1.921.I seria1Nq.4sO,1sa.

any summe kind, um h SO-Caued'asbestos cement is preferred. pon this coating of vcement I apply a thick coating of paper 8 which may be formed in several layers. The surface of the paper is materially roughened in any 'suitable manner so as to form corru.`

gations 9 positioned close together and equally spaced, these corrugations for-'ming alternating elevations and V-shapedl depres` sions in the coating along the length of thebar. After the corrugations are formed-1ongitudinally extending ribs 10 are pressed out y ofthe paper coating andtwo ormore of such ribs may be used, as shown in Figs. 3 and 5. These ribs thus serve to break up the corrugations at two or more points in eachI section of corrugatin so-thatdwhile the coatingA 'may be burned through at .the depression, as 11, the whole adjacent corrugation 12 will not fall ofil from theelectrode in a -partially burned' condition because vthe ribs have to be burned through and they do not burn through until this whole section 12 has been consumed, and thus the insulating covering of the electrodeiburns evenly and does not interfere with thev welding process accomplished by the melting of the metal bar. As in my former patent, I prefer to saturate the paper with a sodium silicate solution and this provides a suitable binder between the paperfand. the coating yof icement.y The electrode is designed for ma chine welding and hand welding.

I desire it to be understood that this invention is not to be limited to any specific formor arrangement of the parts except in .So far as such limitations are specified in thel f claims. l

What I claim as my invention'is':

1. An electrode for welding purposes, .oomprising abar of'metal, a coat of cement on said bar, and an insulating paper ycovering over the cement, said paper having transversely extending depressions therein and longitudinally extending ribs.

2. An electrode for welding purposes, comprising a bar of metal, a coat of cement on said bar,`and a thick. coat of paper covering said cem-ent, said paper being corru ated transversely and provided with long1tudinally extending ribs. y

3. An electrode for welding purposes, comm prsing a bar of metal',l a coat of cement on said bar, and a thick coat of paper covering said cement, said paper having depressions means for connecting the elevations of adjacent sections together at a plurality of points.

5. An electrode for Welding purposes, comprising a barof metal, a coat of cement on saidY bar, a coat of paper covering said cement, said paper having alternating depressions and elevations along its length, and rib portions connecting the elevations of adjacent sections together.

JOSEPH W. FAY. 

